<?php
echo 123 + 5000 ,"\n";  // 使用连接符.连接表达式和字符串
echo 18 / 5 , "\n";      // 除法运算
echo 18 % 5 , "\n";      // 求余数（模运算）
echo @(18.9%5.1),"\n";  // 显式转换为整数再求余，避免@抑制错误
echo (-3) **2 ,"\n";
echo 8/2*3,"\n";
echo "100000"+234,"\n";
echo  234+"100000","\n";
echo  "100000"+'234',"\n";
echo "100000"+'0o234',"\n";
echo "100000"+'0x2A',"\n";
echo "100000"+'123aaa',"\n";
echo "100000"+'-2e2aaa',"\n";
//浮点数
echo  3.14,"\n";
echo  3.14e5,"\n";
echo  fmod(num1:18.9,num2:5.1),"\n";
?>
